Amalgams

they escaped from the lab and went on a killing spree the only monster they won't attack is alphys since they fear her the most since she knows how to kill them and uses that as a threat

Lemon Bread
They are the most dangerous since he's bite is very venomous and slowly drains your life but leads him to you he is the slowest but strongest of the amalgams

Endogeny
they are the quickest and more like a spider than a dog when they finds prey they pins them down and suck their vital organs out of their body and leaves the rest for any scavengers

Reaper bird
they are the most vicious out of all the amalgams if they find prey they will run them down and stamp on the frightened victim until they bleed to death

Snow Drake's mother
they are the most kindest of the amalgams when they have made a  kill they would cry while their eating since they are very emotional before the “feast” and this is challenging their sanity

Memory Head
these three use happy memories to bring their prey more closer if you remember something good RUN while you can

these three use happy memories to bring their prey more closer if you remember something good RUN while you can